# Digital Electronics MCQs Set-3

1. Which one of the following is the type of complement for each base R system?
• Diminished radix-complement representation [(R – 1)’s complement]
• Radix- complement representation [R’s complement]
• 1’s and 2’s complement representation
• Both A and B
2. For subtraction of binary number, subtract the _________________.
• Minuend from the subtrahend digit
• Subtrahend digit from the minuend
• MSB from the LSB
• None of the above
3. Which of the following condition is true for determining overflow condition in 2’s complement?
• When adding two positive numbers gives a negative result or when two negatives give a positive result.
• If sign bit (MSB) of result and sign bit of two operands are of different signs.
• The ‘1’ in the MSB position indicates a negative number after adding two positive numbers.
• All of the above
4. What does the leftmost bit represents, according to the IEEE standards?
• Sign of the number
• Position of the number
• Weight of the number
• None of the above
5. Floating-point numbers are those numbers, which include ______________
• Decimals
• Fractional parts
• Integer values
• All of the above
6. The binary representation of 0.875 is 0 01111110 11000000000000000000000 in _______________ presentation
• 128- bit
• Excess 127
• 32- bit
• 16-bit
7. 1000001 represents as (65)10 in which code?
• ASCII code
• Straight binary code
• Gray code
• BCD code
8. Binary Coded Decimal or BCD is also known as ______________
• 2841
• 4821
• 4281
• 8421
9. In straight binary code, N-bits or N binary digits can represent ______________ different values.
• 2^N
• 2^N+1
• 2^N-1
• 2^N-1
10. What is the decimal representation of decimal number 5?
•  0000
•  1001
•  0011
•  0101